Vehicle fire on the Cuesta Grade, 40 acres burned

A vehicle fire on Highway 101 north of San Luis Obispo sparked a fast-moving brush fire on the Cuesta Grade Wednesday afternoon, burning roughly 40 acres and prompting evacuation orders on the east side of the freeway between the north edge of San Luis Obispo and just south of Santa Margarita.

CalCoastNews reported that shortly before 2 p.m. on Wednesday, Sept. 23, a caller reported a Tesla burning on northbound Highway 101 near Stagecoach Road, according to the California Highway Patrol. The driver was out of the vehicle when crews received the report, according to the CHP account relayed by CalCoastNews.

The blaze, dubbed the Cuesta Fire, had scorched approximately 40 acres with no containment reported as of the initial publication of that report Wednesday afternoon.

Evacuations and what residents should know

According to CalCoastNews, an evacuation order was issued for the east side of Highway 101 from north of San Luis Obispo to just south of Santa Margarita. Residents in and near that corridor — including outlying areas along Stagecoach Road and the rural stretches between the city and Santa Margarita — should treat the order as mandatory and leave promptly if they are in the affected zone.

Fire conditions on the Central Coast in late September remain a serious concern. The region has seen repeated red flag warnings and offshore wind events in recent autumns, and the steep, dry terrain of the Cuesta Grade is among the most fire-prone stretches of Highway 101 in San Luis Obispo County. Drivers traveling between San Luis Obispo and the North County should expect lane closures, slow traffic and possible full freeway interruptions, and are advised to check current conditions before departing.

For real-time evacuation maps and updates, residents should consult the San Luis Obispo County Sheriff's Office advisories, Cal Fire's incident pages, and official county emergency notification systems.

Why the Cuesta Grade burns so readily

The Grade — the steep, roughly 1,000-foot climb from San Luis Obispo up to the Santa Margarita valley — funnels traffic through narrow, grass- and brush-covered canyons each day. Vehicle fires there are a well-established ignition risk: overheated brakes, blown tires, catalytic converters and crashes have all started fires along the corridor over the years. When wind aligns with the canyon topography, flames can move quickly through dry annual grasses and chaparral, which is consistent with the rapid growth to 40 acres described in Wednesday's report.

The incident also comes at a moment of heightened local attention to electric vehicle fires. A burning Tesla was reported as the source of this blaze, according to the CHP account cited by CalCoastNews. EV battery fires can burn intensely and are difficult to extinguish, requiring large volumes of water or specialized techniques, a challenge fire departments across the state have been training for as EV adoption grows.

A familiar name: Cuesta Fire

The "Cuesta Fire" name carries local history. A 2015 fire by the same name broke out on the grade and burned thousands of acres toward Santa Margarita and beyond, at one point threatening homes and ranches in the area. Wednesday's blaze is far smaller at 40 acres, but the shared geography is a reminder of how quickly a vehicle ignition on the grade can grow when conditions line up.

No injuries had been reported in connection with Wednesday's fire, according to the initial CalCoastNews report, which noted only that the driver was out of the vehicle before the fire spread. No structure losses were reported in the initial account.

What comes next

As of Wednesday afternoon, containment was listed at zero percent, meaning crews were still working to establish control lines. Typical next steps for an incident of this kind include additional engine and air resources, structure protection for rural properties east of the freeway, and traffic management on Highway 101, the sole major artery between San Luis Obispo and the North County.

Commuters, Cal Poly students and anyone traveling to Paso Robles or points north should monitor Caltrans and the CHP for lane closures, and residents under the evacuation order should avoid returning until officials lift it.

805.life will update this story as additional details — including containment figures, cause confirmation and evacuation status changes — are confirmed by Cal Fire, the CHP and San Luis Obispo County officials. Initial figures in fast-moving incidents often change quickly in either direction.

This article is based on reporting by CalCoastNews ([calcoastnews.com](https://calcoastnews.com/2026/09/vehicle-fire-on-the-cuesta-grade-40-acres-burned/)) and official incident information. Readers under evacuation warnings should follow directions from the SLO County Sheriff's Office and Cal Fire.